The Audi RS4 Fuel Pump Assembly includes a fuel pump and its associated components that serve the purpose of transferring fuel from the fuel tank to the engine. There are two types of fuel pumps: mechanical and electrical. Mechanical pumps are used in automobiles with carburetors whereas electrical pumps are used in vehicles with electronic fuel injectors. The fuel pressure generated by a mechanical pump ranges from 4 to 8 pounds of pressure while that of an electric pump ranges from 20 to 70 pounds of pressure. In some automobiles, the fuel pump may be located far from the engine. In such cases, two pumps are employed. The first pump that is located in the fuel tank carries fuel from the fuel tank to the second pump at a lower pressure. The second fuel pump that is located near the engine pumps the fuel at the desired pressure level. A worn out fuel pump will cause a rough idling, hard starting, spluttering at high engine speeds and fuel pressure fluctuations.

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